Optical tool.



PATENTED DEC. 31, 190?.

G. E. SGHOPIELD.

OPTICAL TOOL. APPLIGATION FILED MAY 18, 1907.

UNITED STATES PATENT OFFICE.

GEORGE E. SOHOFIELD, OF BALTIMORE, MARYLAND.

OPTICAL TOOL.

To all whom it may concern:

Be it known that I, GEORGE E. Sorro-' FIELD, a citizen of the United States, residing at Baltimore, in the State ofMaryland, have invented certain new and useful Im rovements in Optical Tools, of which the ollowing isa specification. v

The main object of this invention is to provide a very simple but eflective little tool especially adapted to be carried by a traveling optician, and is designed particu larly to facilitate the drilling of openings in lenses, and operations upon nose pieces or bridges of s ectacles and eye-glasses.

As is wel known it is impracticable for traveling Opticians to carry with them the ordinary apparatus customarily employed in shops, for optical work, though it is necessary that they shall be provided with some convenient means for drilling and otherwise operating upon eye-glasses, both the lenses and the metal trimmings employed therefor.

The present invention embodies I a compound tool, adapted to be made so as to occupy a very small amount of space, three or four inches, or there about, and convenient for performing various operations such as above premised.

For a full understanding of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result, reference is to be had to the following description and accompanying drawings, in which:

, Figure 1 is a perspective view of an optical tool'embodying the present invention; Fig. 2 is a transverse sectional view of the device, the drill being removed, and the nose piece of a pair of eye glasses being diposed in operative position as when being actually operating upon; Fig. 3 is a detail perspective view of the gage plate and anvil, alone, and Fig. 4 shows a slightly modified form of the gage plate and anvil member.

Specifically describing the present invention, and referring to the drawing, the numeral 1 designates a bed late which is preferably of circular form t ough it may be of any suitable shape, said plate being provided with an integrally u wardly projecting standard 2 which exten s from an edge portion thereof and terminates at its upper end Specification of Letters Patent.

Application filed May 18 1907- Serial No. 37 L449. V

"tially drilled opening, insuring the exact posi- Patented Dec. 31, 19o7.

4 of the head 3 comprises a vertical bearing. in which is journaled a small hand drill 5, the latter being of conventional type, as shown most clearly in Fig. 1 of the drawing. In its upper surface the bed plate 1 is provided with a suitable gage-mark 6 indented therein, the latter being employed to facilitate a proper positioning of a lens which may be disposed upon the plate 1 preparatory to drilling an opening oropenings therein. A small projection 7, or point, extends upwardly from the plate land is adapted to cooperate with a lens to adjust the position of the latter in a drilling operation. When openings are being drilled in lenses, the 0 ening is first drilled from one side of the ens and the latter is reversedand the 0 ening completed from the opposite side. n the reversal of the lens the projection 7 is utilized to enter the recess formed by the inition of the lens in order that the opening may be properly drilled therein.

It is necessary in drilling openings in lenses, for attachment of the nose pieces thereto, for instance, that some convenient means be provided to hold the. lens at a desired adjustment relative to the drill, whereby the openin drilled in said lens will be at a predetermine point with reference to the edge of the lens. In the present toola small gage plate 8 is used to accomplish the'above, said plate being formed with an upturned extremity 9 constituting a seat or bearing against which an end of the lens may be p aced, in positioning the same with reference to the drill 5. The upturned-extremity 9 is curved to conform with theedge contour of the lens, and the plate 8 is longitudinally slotted as shown at 10, to permit of slight adjustmentthereof relative to the drill 5. A screw 11 is employed to hold the' gage plate 8 in an adjusted position and passes-through the slot 10, screwing into a threaded opening provided in the bed plate 1. By slightly 100 loosening the screw 11 the gage plate 8 may be moved to adjust its extremity 9 with referenoe to the drill 5.

- The form of the gage plate 8 is peculiar.

It is provided at its outer end with an in- 10's mitting of use of a punch in order to close the threaded opening formed in one of the ears comprising the stud-piece or pieces of a nose piece of eye glasses. By using the punch 13 as indicated in Fig. 2 the stud of the nose piece 14 may be readily operated upon, so as to swage the metal of one of the ears resting on the anvil 12, whereby to close the threaded opening in said ear and permit of use of a tool to retap said opening. Very frequently the threaded openings of the studs of nose pieces become stripped of their threads and it is necessary to rethread them.

Under such conditions the operation of threading or retapping the ear of the stud will be performed in the manner above described using the punch .13 in said operation.

Under certain conditions it may be de sirable that the gage plate 8 be removable or detachable from the bed plate 1, without necessitating removal of the adjusting screw 11. With this in view the modification of the invention shown in Fig. 4, may be eIn-.

was

vention will be very clear from the foregoing and from the standpoint of practical use it will be observed that the tool above described is extremely desirable byreason of its portability and simplicity. Having thus described the invention what is claimed as new is: 4

An optical tool of the'character described comprising a bed plate, an adjustable gage plate provided with a longitudinal slot mounted upon the bed plate, and a screw extending through said slot into the bed plate to secure the age plate in adjusted position, the outer end of the gage plate bein turned to constitute an anvil and eing slotted for the purpose set forth,- the latter slot being an extension of the former slot.

Intestimony whereof I afiix my signature in presence of two Witnesses.

GEORGE E. SCHOFIELD. Witnesses:

BERNARD A. SoHMrrz, FRANK M. MERRIKEN. 

